88 NEW- YORK FAUNA. 



(EXTRAL1M1TAL.) 



Genus Siren, Linneus, Auct. Body eel-shaped. Two anterior legs. Teeth in the palate and jaws 

 Obs. The two last species of this genus have been arranged by some authors under the genus 



Pseudobranchus. 

 S. lacertina. Black above; dusky beneath. Toes four. Length two to three feet. South Carolina. 



Florida. 

 S. intermedia. (Le Conte, Ann. Lye. Vol. 2, pi. 1.) Similar to the preceding, but smaller. Gills 



included in a fleshy trilobate covering. Length, one foot. 

 S. striata. (Id. lb. Vol. 1, pi. 4.) Dusky, with two longitudinal stripes on each side. Gills as in the 



preceding. Length, seven to nine inches. 



FAMILY AMPHIUMIDM. 



Body long, formed for swimming. Feet four. Cranium solid. Tail compressed. Respi- 

 ration by means of lungs only. No gills, but only cervical orifices. No metamorphosis 

 known. 



This family is equivalent to the order Abranchia of Bell, and to the families Menopomatida 

 and AmphiumidcE of Hogg and Bonaparte. 



(EXTRA-L1MITAL.) 



Genus Amphiuma, Garden, Harlan. Body eel-shaped. Head and neck continuous. Legs feeble, 

 rudimentary, with two or three jointless toes. No ribs. Two rows of teeth in the upper, and 

 one in the lower jaw. 

 A. means. (Harlan, Ann. Lye. Vol. 1, pi. 22.) Dark brown. Feet bifid at the extremities. Length 



one to three feet. South Carolina to Mexico. 

 A. tridactylum. (Cdvier, Tr. Acad. Sc. 1826, pi.) Similar to the preceding. Feet trifid. Alabama, 

 Arkansas. 



GENUS MENOPOMA. Harlan. 



Body robust. Head distinct from the neck. Tail broad, compressed. Lower jaw with a 

 single row of teeth ; upper jaw vjith an additional row . Ribs rudimentary. Legs stout, 

 with four toes before and five behind. 



Obs. This genus was first distinctly established by Dr. Harlan, under the name of Abran- 

 chus, which having been discovered to be preoccupied, he changed it to Menopoma. Others 

 have proposed new names either erroneous in themselves, or unaccompanied with descriptions. 

 Such are those proposed, but not defined by Prof. Barton, under the names of Salamandra 

 horrida, gigantea, maxima, and Protonopsis horrida. 



